Doorstop



March 21, 1944. J. 5. SWANN DOOR STOP Filed Dec. 26, 1941 3 Sheets-Sheet l OOOO OOO O March 21, 1944.

J. s. SWANN 2,344,524

DOOR STOP Filed Dec, 26, 1941 s Sheets-Sheet s [imam m- Jam? Jim Patented Mar. 21, 1944 UNITED STATES PATENT OFFICE DOORSTOP James S. Swann, Homewood, Ill.,

assignor, by

mesne assignments, to Standard Railway Equipment ration of Delaware Manufacturing Company, a corpo- Application December 26, 1941, Serial No. 424,431

23 Claims.

The invention relates to side doors for railway cars and specifically to stops or retarding means factured and sold by my assignee, and disclosed and claimed in G'ilpin Patent No. 1,902j772 of March 21, 1983.

Such a side door moving of the door. The depressions in the track are positioned so that this frictional resistance to moving is efiective when the door is in the full open and full closed positions and so that the rollers roll upon the track when the door is in any position between the full open and full closed.

Railroad regulations require that before a car is moved, the door thereof should be absolutely locked so as to prevent sliding of the door during service movements of the car. This regula tion is not universally complied with and railroad operators often rely upon the above mentioned frictional resistance to prevent movement of the door. In recent years a combination of circumstances, such as increased train and switching speeds and heavier loading of cars, has tended to impart more violent impacts to cars during service with the result that the above mentioned frictional resistance as well as other retarding means sometimes used have become The friction between the non-- inadequate to prevent accidental door movement. Such movements are liable to cause dam age to the car and to the door, as well as injudy to an operator who happens to get in the way of such a moving door.

An object of the invention is to provide a stop or retarding means for a sliding door which is operative to prevent accidental movement of the door from the full open and full closed posiof the operator for moving the door.

In a door of the type hereinabove described in which the door is at times supported upon the track by non-rotative members and retarded from moving by the friction between the track and such members, means are commonly proing means and prior to efiective operation of such means for moving the door.

When the door of the weight of the door.

One well known type of railway car side door embodies anti-friction rollers revolubly mountpermits movement of the door.

Other objects and advantages of my invention will be apparent from the following detailed de scription by ings:

In the drawings:

Fig. 1 is a partial side elevation of a railway car showing a side door which embodies my invention.

Fig. 2 is an enlarged view of a portion of Fig. 1 showing the door moving means and the door stop.

Fig. 3 is a section on line 3-4 of Fig. 2 showing the door in the full closed position and the door stop in position to prevent movement of the door.

Fig. i is door moving means in operation thereof for moving door stop in released position.

Fig. 5 is a view similar to Fig. 2 showing a modified form of the invention.

Fig. 6 is a section on line 6- of Fig 5 showing the door in full closed position and the door stop in operative position for preventing movement of the door.

Fig. '7 shows the door in full closed position, the door moving means in operative position and the door stop in released position to permit move.- ment of the door.

Fig. 8 is a view showing the door in a position intermediate the full open and full closed positions with the door moving means inoperative and the door stop in released position to permit movement of the door.

Fig. 9 is a partial side elevation of a railway car door showing another modification of my invention.

Fig. 1 Fig. 9.

Fig. 11 is a section on line H--!! of Fig. 10 showing the door stop in operative position for restraining movement of the door.

referring to the accompanying drawa view similar to Fig. 3 showing the position preliminary to the door and the is an enlarged view of a portion of Fig. 12 is a view similar to Fig. 11 showing the door stop in released position to permit door movements.

in the drawings em- The railway car shown bodies the usual side wall comprised of side plate 2, side sill 3, posts extending between the plate 2 and siil 3 and sheathing secured to the plate, sill and posts. A bulb angle side sill reinforcement 6 is attached to the lower part of the side sill 3 adjacent the doorway. The door 8 is arranged to move in a plane parallel with the side wall of the car as will be hereinafter described.

The door 8 is provided with roller housings H3 rigidly mounted upon the door 3 at the lower corners thereof and rollers H revolubly mounted within the housings it. The track it, which in the arrangement shown is a channel member disposed with its web it vertical, is supported in spaced relation to the car side wall by brackets it which extend outwardly from the side sill reinforcement 6. The track [3 is formed with depressions ll positioned to receive the rollers ll when the door 8 is in the full, opened and full closed positions, in which positions the weight of the door is assumed by pads it on the housings it which rest upon the track 13. The rollers H are thus out of operative engagement with the track l3 and the friction between the pads is and the track it tends to keep the door from moving.

A fulcrum member 23, which in the form shown is a casting; is rigidly mounted upon the door 8 preferably mid-way between the lower corners thereof. A starting bracket 2d comprised of spaced apart outstanding lugs 261s mounted upon "the position shown in Fig.

the track It. The fulcrum member 23 comprises an outwardly projecting boss 21 having a thimble 28 riveted thereto, which thimble forms a pivot center for a handle as will be described. The

28 has an elongated hole 30 which re- 28 and thereby permits the handle to both pivot and slide a limited distance. To operate the door moving means. the operator inserts the lower end 32 of the handle 29 between the lugs 26 of the starting bracket 21!. and then pulls upon the upper end of the handle 29 in a substantially horizontal direction. The mechanical advantage thus obtained is adequate to enable the operator to overcome the friction between the pads l9 and the track i3 and move the door 8 until the rollers H are moved out of the depressions l1 and into operative engagement with the track Hi.

The fulcrum member 23 is preferably provided with an inner guiding part 33 arranged to move the upper end of the handle 23 outwardly when the handle is in a substantially vertical position so as to provide hand clearance between the handle and the door. The fulcrum member 23 is also provided with an outer guiding part 35 arranged to pull the handle 29 inwardly toward the car when in a substantially horizontal position so as to remain within the permissible overall width for cars.

In the modification shown in Figures 1 to i, a horizontally extending rod 33 having flattened ends 39 is secured to the lower part of the fulcrum member 23 so as to extend in the direction of the track 13. Angle members 0.! having outstanding substantially horizontal legs 32 are rigidly attached to the side sill reinforcement 6 for purposes to be hereinafter described. The dog M is preferably made of a strap formed to the contour shown in Figures 3 and 4 and has spaced apart lugs 45 welded to the under side thereof so as to form a seat in which the rod 38 nests so as to pivotally support the dog 44. The dog s4 is shown in its normal position in Figure 3 with its inner end it! engageable with the horizontal leg 42 of the angle member 4| so that the dog is engages the leg 42 to prevent movement of the door 3. The angle member 4| is preferably positioned adjacent the center of the doorway and has the right hand end 48 of the horizontal leg t2 deflected downwardly so that as the door moves to the closed position; that is, toward the left; the inner end Al of the dog M rides up the inclined part 138 of the leg 12 and drops abruptly off the left hand end of such leg. Movement of the door toward the right, which is toward the opened position, is thereafter prevented. A similar angle member is preferably provided to the right of the doorway and has its left hand end inclined so that the door stop becomes operative upon movement of the door to the full opened position.

In order to operate the door moving means and move the door, the handle 29 is made to slide upon the thimble 23 until the lower end 32' of the bandle 29 is inserted between the-lugs2 of the starting bracket 2 The operator then exerts asubstantially horizontal force uponthe upper end of the handle 23. thereby moving the handle from one side to the other of a vertical line through the pivot center; the rollers H are then moved out of the depressions l1 and operatively engage undepressed parts of the track l3. When the handle 29 is in this operative position, a portion thereof engages the outer end 56 of the dog it, thereby moving such Outerend downwardly to 4'. As the outer end 523 the door 8 to move freely.

In the modification shown boss 52 has an in Figures to 8, the of the fulcrum member 53 is hollow and In order to move the door 8, the handle 29 is operated as hereinabove described in reference to is then possible. After the operator makes use of the door mov- When the door is in any intermediate position, the rollers I I operatively engage undepressed parts of the track I 3, as shown in Fig. 8, and the door 8 is elevated approximately above the full closed position shown in Figs. 6 and 7. The dog 55 is provided with a face 68 which rides upon the inner edge of the upper track flange 59 and thereby prevents the part 51 of the dog 55 from engaging the 111g 62 and restraining movement of the door. It is evident from Fig. 1 that, as the door 8 moves from full closed to full opened position or vice-versa, the dog must pass the track depression 63 jacent the rear door post. The face 68 of the dog 55 is, therefore, of considerable vertical extent sothat it engages the depressed part 69 of the flang The fulcrum member 53 disclosed in Fig. 5 is revised somewhat over that disclosed in Fig. 2. The fulcrum member 53 embodies a central guidupper end of th ban.

and also embodies ears 12 to retain the handle 29 within the clearance lines when such handle is at rest in a substantially horizontal position.

In the modification shown in Figures 9 to 12,

movement to the carriages 79. mounted exterior of the left hand A handle 84 is housing and c door resting upon the track 85. The friction between the lower frame strip 87 and the track restrains movement of the door.

through an the full opened and full closed positions of the door. The carriage 19 which is within the left-hand roller housing 75 is provided with an arm me which extends tothe dog is provided with an 81 into operative engagement with the track 85. Such rotation of the carriage 19 moves the arm I00 upwardly, causing it to engage the tail ll of the dog 95 and to move such tail outwardly, and thereby moving the lower outwardly extending part 94 of scribed, as it is obvious that various modifications thereof, within the scope of the claims, will occur to persons skilled in the art.

I claim: 7

l. A door stop for a door mounted for movement along a substantially horizontal track carried by a railway car having door moving means including a lever movably carried by said door and adapted to engage a lug rigidly carried by said car, said door stop comprising a member rigidly carried by said car and a dog pivotally mounted upon said door comprising a first part normally engageable with said member-to restrain movement of the door along said track, and a second part normally in the path of operative movement of said lever and arranged to be moved thereby to a position wherein said first part is clear of said member substantially simultaneously with movement of the door by said door moving means.

2. A door stop for a door mounted for movement along a substantially horizontal track carried by a railway car having door moving means including a lever movably carried by said door and engageable with a lug mounted upon the car, said door stop comprising a member rigidly carried by said ear and a dog mounted upon said door for pivotal movement about an axis substantially parallel with the direction of movement of the door, said dog comprising a first part normally engageable with said member to restrain movement of the door and a second part engageable by said lever to move said first part clear of said member as said lever engages said lug to actuate the door moving means.

3. A door stop for a railway car door having rollers revolubly mounted upon the lower edge thereof and arranged to roll upon a horizontally extending track having depressions therein adapted to receive said rollers in predetermined positions of said door, said door also having a lever pivoted thereto and adapted to move said rollers out of said depressions, said door stop comprising a dog pivotally mounted upon said door, said dog including engageable with a restraining member rigidly carried by the car to restrain movement of the door along the track and a second part normally in the path of movement of said lever as the lever moves the rollers out of said depressions so that said first part, actuated by the engagement of said lever with said second part, is moved clear of said restraining member to permit movement of the door.

4. A door stop for a railway car door having rollers revolubly mounted upon the lower edge thereof and arranged to roll upon a horizontally extending track having depressions therein adapted to receive said rollers in predetermined positions of said door, said door also having a lever pivoted thereto and adapted to engage a lug carried by the track to move said rollers out of said depressions, said door stop comprising a dog mounted upon said door for pivotal movement about an axis substantially parallel with said track, said dog including a first part normally engageable with a restraining member forming a part of said track to restrain movement of the door along the track, and a second part normally in the path of movement of said lever as the lever moves the rollers out of said depressions so that said first part, actuated a first part normally by the engagement of said lever with said second part, is moved clearof said restraining member to permit movement of the door.

5. A door stop for a railway car door which is restrictively movable upwardly and downwardly and freely movable horizontally when up and restrained from horizontal movement when down, and means to move said door to its upward position, said door stop comprising a dog movably carried by said door and having a first part normally engaging a member rigidly carried by said car when the door is in its downward position to prevent upward movement of the door and a second part actuated by said means during operative movement thereof to move said first part out of engagement with said member.

6. A door stop for a railway car door, said car carrying a track for supporting said door for restricted upward and downward movement, said door being freely movable horizontally when up and restrained from horizontal movement when down, and means to move said door to its upward position, said door stop comprising a dog movably carried by said door and having a first part normally engaging a portion of said track when the door is in its downward position to prevent upward movement of the door, and a second part actuated by said means during operative movement thereof to move said first part out of engagement with said track.

7. A door stop for a railway car door which is restrictively movable upwardly and downwardly, and freely movable horizontally when up and restrained from horizontal movement when down, and means to move said door to its upward position, said door stop including a lever pivotally carried by said door, a dog pivotally carried by said door and having a first part normally engaging a member rigidly carried by said car when the door is in its downward position to prevent upward movement of the door, and a second part engageable by said lever during operative movement thereof to move said first part out of engagement with said member.

8. A structure as defined in claim 1 wherein said dog is provided with a vertical face engageable with said track to retain said first part of the dog clear of said restraining member during the movement of the door along the track independently of the lever.

9. A structure as defined in claim 3, wherein said dog is provided with a vertical face engageable with said track to retain said first part of the dog clear of said restraining member during the movement of the door along the track independently of the lever, said face having sufiicient vertical depth to maintain said clearance when the dog passes the depressions in the track.

10. A door stop for a railway car having a door track, a door provided with rollers engageable with said track, and a lever pivotally mounted upon the door eccentrically from one of said rollers, whereby rotation of said lever in one direction engages the rollers with said track and a rotation of said lever in the opposite direction disengages said rollers from said track; said door stop comprising a dog pivotally mounted upon the door and positioned to engage a member on the car body when the rollers are disengaged from the track to stop movement of the door along said track, and means associated with said lever to move the dog out of engagement with said member w. en the lever is rotated to engage the rollers with the track to allow movement of'the door along said track.

11, Means to prevent the accidental upward her by said lever as said lever moves the door. face being at least as deep as said depressions impart horizontal movement to the door, said move said dog so that said first part can move the door to swing under a member mounted the handle is moved. upon the car to prevent upward movement of 17. A door stop for a railway car door h i member by said lever as said lever moves the door. thereof and arranged to roll upon the upper impart upward movement to the door, said adapted to receive said rollers in predetermined the car to prevent upward movement of the door, a lug carried by said track to thereby move said said dog bBlIlg released from sald membe by rollers out of said depresslons into operative ensaid lever as said lever moves the door. e s ment with undepressed parts of the track,

14. A door stop, for a railway car door, said i r p pr in a do piv ta ly m n of said track when up and restrained from s ch operative association with said track when the position for the purpose of further restraining the rollers engage undepressed portions of the 15. A door stop, for a railway car door, having of operative association with said track as the rollers revolubly mounted upon the lower edge handle is moved to engage S d 111g. thereof and arranged to roll upon a horizontally A C1001 Stop, for a aiIWa-V C911 extending track having depressions therein mg rollers volub y mounted upon the lower or sai Stop comprising a dog movably by Said having a handle pivoted thereto and adapted to of said track, said dog including a face slidably track when the rollers are in the depressions said handle as the handle is moved to move said Operative association and a Sec d Pa norma part can move out of operative association with die as the handle is moved to certain positions to said track as the handle is moved. thereby move said dog so that said first part can extending trac having depr ssions therein 1 A door stop, for a railway car door, havadapted to r ceive said rollers 1n predeteim ned ing rollers revolubly mounted upon the lower positions of the door, said door also having a ham edge thereof and arranged to roll upon a horiciation with said track when therein adapted to receive said rollers in predetermined positions of the door, said door also having a handle pivoted thereto and adapted to engage a lug carried by said track to thereby move said rollers out of said depressions into operative engagement with undepressed parts of the track, said door stop comprising a dog mounted upon said door, said dog infirst part normally in operative assothe rollers are in the depressions for the purpose of restraining movement of the door, said dog including a face slidably engaging said track when the rollers engage undepressed portions of the track to prevent said operative association, and a second part normally disposed in the path of movement of said handle as the handle is moved to certain positions, to thereby move said dog so that said first part can move out of operative association with said track as the handle engages 20. A door stop, for a railway car door, having rollers revolubly mounted upon the lower edge thereof and arranged to roll upon a horizontally extending track haviing depressions therein pivotally cluding a adapted to receive said rollers in fully openedv and closed positions of the door, said door also having a handle pivoted thereto and adapted to engage a lug carried by said track to thereby move said rollers out of said depressions into operative engagement with undepressed parts of the track, said door stop comprising a dog mounted upon said door for pivotal movement about an axis substantially parallel with said track, said dog including a first part normally in operative association with said track when the rollers are in the depressions for the purpose of restraining movement of the door, said dog including a face slidably engaging said track when the rollers engage undepressed portions of the track to prevent said operative association, and a second part normally disposed in the path of movement of said handle as the handle is moved to certain positions, to thereby move said dog so that said first part can move out of operative association with said track as the handle engages said lug.

21. A door stop, for a railway car door, hav ing rollers revolubly mounted upon the lower edge thereof and arranged to roll upon the upper flange of a horizontally extending track com-. prised of an inwardly facing channel member carried by the car in spaced relation thereto,

said lug.

said upper flange having depressions therein adapted to receive said rollers in predetermined positions of the door, said door also having a handle pivoted thereto and adapted to engage a lug carried by said track to thereby move said rollers out of said depressions into operative engagement with undepressed parts of the track, said door stop comprising a dog mounted upon said door for pivotal movement about an axis substantially parallel with said track, said dog including a first part normally projecting within said channel in operative association with said track when the rollers are in the depressions for the purpose of restraining movement of the door, said dog including a face slidably engaging the inner edge of the upper flange of said channel member when the rollers engage undepressed portions of the track'to prevent said operative association, and a second part normally disposed in the path of movement of said handle as the handle is moved to certain positions, to thereby move said dog so that said first part can move out of operative association with said track as the handle engages said lug.

22. Means to prevent horizontal opening movement of a railway car door supported by rollers upon a horizontal track provided with depressions arranged to receive the rollers in a predetermined position of the door and having a lever to impart horizontal opening movement to the door; said means comprising a dog adapted to prevent the door from moving upwardly sufiiciently for the rollers to rise out or" the depressions and thereby prevent horizontal opening movement of the door, said dog being released by said lever upon the initial movement thereof.

23. Means to prevent horizontal opening movement of a railway car door supported by 

